Adds check in zipping when file does not exist  (#353)
Adds check in zipping when file does not exist  (#353)

* Adds check in zipping when file does not exist - can happen if genotyping was deleted, but entry in db still there

* Satisfy the hound

* No spaces in the chk

openSNP/snpr,openSNP/snpr,openSNP/snpr,philippbayer/snpr,philippbayer/snpr,openSNP/snpr,philippbayer/snpr,philippbayer/snpr